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Levocetirizine 5mg

Levocetirizine 5mg

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  • ✔️ Relieves hay fever, hives, and allergic rhinitis symptoms effectively
  • ✔️ Starts working within one hour of taking a single tablet
  • ✔️ Once-daily 5mg dose provides up to 24 hours of allergy relief
  • ✔️ Suitable for adults and children aged six years and over
  • ✔️ Less sedating than older antihistamines, supporting daytime use

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What Are Levocetirizine 5mg Tablets Used For?

 

If you struggle with sneezing fits every spring, wake up with itchy eyes, or find yourself reaching for tissues every time you step outside, you are far from alone. Allergic rhinitis — commonly known as hay fever — affects around one in five people in the UK. Levocetirizine 5mg tablets offer targeted, once-daily relief from the full range of allergy symptoms, including a runny nose, itchy skin, watery eyes, and sneezing. Available without a prescription, they are a practical option for adults and children aged six and over who need dependable allergy control. You can explore the full range of allergy and hay fever treatments available at Cured Pharmacy if you want to compare your options.

Levocetirizine is the active R-enantiomer of cetirizine, meaning it is a more refined form of a well-established antihistamine. It works at a lower dose while maintaining a strong affinity for H1 histamine receptors. This makes it one of the more precisely targeted oral antihistamines currently available over the counter in the UK.

 

How Do Levocetirizine 5mg Tablets Work?

 

Histamine is the chemical your immune system releases when it encounters an allergen — pollen, dust mites, pet dander, and so on. It binds to H1 receptors throughout the body, triggering the familiar cascade of allergy symptoms. Levocetirizine interrupts that process by selectively blocking those receptors before histamine can cause harm.

  • Levocetirizine binds selectively and with high affinity to peripheral H1 histamine receptors.
  • It reduces vascular permeability, which limits the swelling and inflammation associated with allergic reactions.
  • It inhibits the migration of eosinophils — white blood cells involved in allergic inflammation — to affected tissues.
  • Because it crosses the blood-brain barrier only minimally, it causes less sedation than older, first-generation antihistamines such as chlorphenamine.

 

Who Is Levocetirizine 5mg Suitable For?

 

Levocetirizine is suitable for a wide range of people dealing with allergic conditions. It is particularly useful if you need all-day symptom control from a single daily dose, or if you have found older antihistamines too sedating for daytime use.

  • Adults and adolescents aged 12 and over experiencing seasonal or perennial allergic rhinitis.
  • Children aged 6 to 11 years (under medical supervision, using appropriate dosing).
  • Adults with chronic idiopathic urticaria (persistent hives with no identifiable cause).
  • People with dust mite or pet dander allergies who need year-round management.

It is not suitable for people with severe kidney impairment, those allergic to cetirizine or hydroxyzine, or children under six years of age. Always read the full patient information leaflet before use.

 

How Does Levocetirizine Compare to Other Antihistamines?

 

Feature Levocetirizine 5mg Cetirizine 10mg Loratadine 10mg
Generation Third (R-enantiomer) Second Second
Dosing frequency Once daily Once daily Once daily
Sedation risk Low Low–moderate Very low
Onset of action Within 1 hour Within 1 hour 1–3 hours

 

Is Levocetirizine Suitable for Long-Term Use and How Should It Be Stored?

 

For conditions like chronic urticaria, levocetirizine 5mg tablets may be used over extended periods under the guidance of a GP or allergy specialist. Short-term use during hay fever season is equally appropriate. Store tablets below 25°C in a dry place, away from direct sunlight, and keep them out of reach of children. Do not use after the expiry date printed on the packaging. If you also experience eye-related allergy symptoms such as itching or redness, you may find it helpful to browse eye care products alongside your antihistamine treatment.

This product is a medicine. Speak to your doctor or pharmacist before using if you have an underlying medical condition or are taking other medicines.

Levocetirizine 5mg Tablets specifications
Treatment category Allergy / Antihistamine
Mechanism of action Selective H1 histamine receptor antagonist
Effective for Allergic rhinitis, chronic idiopathic urticaria, hay fever
Suitable for Adults and children aged 6 and over
Active ingredient Levocetirizine dihydrochloride 5mg
Strengths 5mg
UK classification General Sale / Pharmacy (P) medicine
Drug class Third-generation antihistamine
Preparation Film-coated tablet
Route of administration Oral

Specifications of Levocetirizine 5mg Tablets

 

What Is Levocetirizine and What Is It Used For?

 

Levocetirizine 5mg is an oral antihistamine tablet used to relieve the symptoms of allergic conditions. It belongs to a class of medicines called H1 receptor antagonists. It is used to treat seasonal allergic rhinitis (hay fever), perennial allergic rhinitis (year-round nasal allergy), and chronic idiopathic urticaria — a condition causing persistent hives and itching without a clearly identifiable trigger. The NHS recognises antihistamines as a first-line treatment for hay fever and urticaria, and levocetirizine is one of the newer, more selective options in this class.

 

What Do You Need to Know Before Using Levocetirizine?

 

Before taking levocetirizine, it is important to check whether it is appropriate for you. Do not take it if any of the following apply:

  • You are allergic to levocetirizine, cetirizine, hydroxyzine, or any other ingredient in the tablet.
  • You have severe kidney disease (end-stage renal impairment with creatinine clearance below 10 mL/min).
  • You are under 6 years of age.
  • You have a rare hereditary condition called galactose intolerance, total lactase deficiency, or glucose-galactose malabsorption (if the tablet contains lactose).

Talk to your pharmacist or GP before taking levocetirizine if you have kidney problems, epilepsy, or are pregnant or breastfeeding. The following medicines may interact with levocetirizine:

  • Alcohol and other central nervous system (CNS) depressants — may increase sedation.
  • Ritonavir (used to treat HIV) — may increase levocetirizine levels in the blood.
  • Theophylline — may slightly reduce the clearance of levocetirizine.

 

How Should You Use Levocetirizine?

 

Always take levocetirizine exactly as directed on the packaging or as advised by your pharmacist. Taking it at the same time each day helps maintain consistent symptom control.

  1. Swallow one tablet whole with a glass of water.
  2. You can take it with or without food — it does not affect absorption.
  3. Take it once daily, preferably in the evening if you find it causes mild drowsiness.
  4. Do not crush or chew the tablet unless the formulation specifically allows it.
  5. Do not take more than one tablet in any 24-hour period.
Indication Age Group Dose Frequency
Allergic rhinitis / urticaria Adults and adolescents (12+) 5mg (1 tablet) Once daily
Allergic rhinitis / urticaria Children 6–11 years 2.5mg (half tablet or oral solution) Once daily (evening)
Renal impairment (mild) Adults 5mg every other day As directed by GP

If you are managing a range of allergy-related symptoms including nasal congestion, you may also find it useful to look at ear, nose, and throat treatments available at Cured Pharmacy.

 

What Are the Possible Side Effects of Levocetirizine?

 

Like all medicines, levocetirizine can cause side effects, although not everyone experiences them. Most side effects are mild and resolve on their own.

Common side effects (may affect up to 1 in 10 people):

  • Drowsiness or fatigue
  • Headache
  • Dry mouth
  • Nasopharyngitis (inflammation of the nose and throat)

Less common side effects (may affect up to 1 in 100 people):

  • Abdominal pain or nausea
  • Dizziness
  • Skin rash or itching
  • Palpitations
  • Difficulty passing urine (urinary retention)

Rarely, levocetirizine may cause a serious allergic reaction (anaphylaxis). Seek emergency medical help immediately if you develop swelling of the face, lips, tongue, or throat, difficulty breathing, or a sudden drop in blood pressure. Stop taking the tablet and contact your GP or NHS 111 if you experience any unexpected or severe symptoms.

 

How Should You Store Levocetirizine?

 

Correct storage helps maintain the quality and effectiveness of your tablets throughout their shelf life.

  • Store below 25°C in a cool, dry place.
  • Keep away from direct sunlight and moisture.
  • Keep out of the sight and reach of children.
  • Do not use after the expiry date printed on the packaging.
  • Do not dispose of medicines via wastewater or household waste — return unused tablets to your local pharmacy for safe disposal.

If you are also managing skin-related allergy symptoms such as hives or eczema flares, you might want to explore skin care products that can complement your antihistamine treatment.

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Your safety and success are our highest priorities. Our medical team rigorously evaluates every product and piece of advice we provide, ensuring you receive only the most effective, science-backed solutions available.

Frequently Asked Questions

Where can I buy levocetirizine 5mg tablets online in the UK?

You can buy levocetirizine 5mg tablets directly from Cured Pharmacy, a GPhC-registered online pharmacy. Simply add the product to your basket, complete a brief health check at checkout, and your order will be dispatched promptly. You can also browse the full allergy and hay fever collection for additional treatment options.

How does levocetirizine work in the body?

Levocetirizine selectively blocks H1 histamine receptors, which are the receptors that histamine binds to when your immune system reacts to an allergen. By occupying those receptors, levocetirizine prevents histamine from triggering symptoms such as sneezing, itching, and a runny nose. It also reduces the movement of inflammatory cells to affected tissues, helping to calm the allergic response more broadly.

How do I take levocetirizine 5mg step by step?

Swallow one 5mg tablet whole with a full glass of water — you can take it with or without food. Take it once daily, ideally at the same time each day, and preferably in the evening if you notice any drowsiness. Never take more than one tablet in a 24-hour period.

What is the best time of day to take levocetirizine?

Most people find taking levocetirizine in the evening works well, as any mild drowsiness it causes will occur during sleep rather than during the day. However, if you experience no drowsiness, you can take it at any consistent time that suits your routine. The key is to take it at the same time each day for steady symptom control.

How long does levocetirizine take to work?

Levocetirizine typically begins to work within one hour of taking a tablet, with peak plasma concentrations reached in around one to two hours. Symptom relief generally lasts for up to 24 hours, which is why once-daily dosing is sufficient. You should notice a meaningful reduction in sneezing, itching, and nasal congestion within the first day of use.

Can levocetirizine cause drowsiness?

Yes, drowsiness is listed as a common side effect of levocetirizine, although it is considerably less sedating than older first-generation antihistamines like chlorphenamine. If you do feel drowsy after taking it, avoid driving, cycling, or operating heavy machinery until you know how the medicine affects you. Taking it in the evening can help minimise any impact on your daytime activities.

Who should not take levocetirizine 5mg tablets?

Levocetirizine is not suitable for children under 6 years of age, people with severe kidney impairment, or anyone with a known allergy to levocetirizine, cetirizine, or hydroxyzine. It should be used with caution during pregnancy and breastfeeding — always speak to your GP or pharmacist first. People with epilepsy or significant renal impairment should also seek medical advice before use.

What happens if I miss a dose of levocetirizine?

If you miss a dose, take it as soon as you remember — unless it is nearly time for your next dose, in which case simply skip the missed one. Never take two tablets at once to make up for a missed dose. Missing an occasional dose is unlikely to cause any harm, but consistent daily use gives the best symptom control.

Is levocetirizine safe to take during pregnancy?

Levocetirizine is not recommended during pregnancy unless your doctor has assessed the risks and benefits and advised you to take it. The NHS advises that loratadine is generally the preferred antihistamine during pregnancy, but you should always discuss your options with your GP or midwife. Do not self-medicate with any antihistamine during pregnancy without professional guidance.

Can I take levocetirizine with other medicines?

Levocetirizine can interact with alcohol, sedatives, and other CNS depressants, increasing the risk of drowsiness. Ritonavir (used in HIV treatment) may raise levocetirizine blood levels, and theophylline may slightly affect how quickly it is cleared from the body. Always tell your pharmacist about all medicines, supplements, and herbal remedies you are taking before starting levocetirizine.

What are the alternatives to levocetirizine for hay fever?

Common OTC alternatives include cetirizine 10mg, loratadine 10mg, and fexofenadine 120mg — all second or third-generation antihistamines available without a prescription in the UK. Nasal corticosteroid sprays such as beclometasone are also recommended for moderate-to-severe hay fever. Your pharmacist can help you decide which option suits your symptom profile best.

How long can you take levocetirizine for?

For seasonal hay fever, levocetirizine is typically taken throughout the pollen season — usually spring and summer in the UK. For chronic idiopathic urticaria, it may be used for longer periods under GP supervision. If you have been taking it for more than six weeks without reviewing your symptoms with a healthcare professional, it is worth booking an appointment to reassess your treatment plan.

Can children take levocetirizine 5mg tablets?

Children aged 6 to 11 years can take levocetirizine, but the recommended dose is 2.5mg (half a tablet) once daily in the evening — not the full 5mg adult dose. Children under 6 should not take levocetirizine tablets. For younger children with allergy symptoms, speak to your GP about age-appropriate alternatives. You can also explore the baby and toddler health range for suitable products.

Does levocetirizine help with hives (urticaria)?

Yes — levocetirizine is licensed for the treatment of chronic idiopathic urticaria, which causes persistent itchy wheals (hives) on the skin without a clearly identifiable cause. It works by blocking the histamine response that drives the itching and swelling associated with hives. Many people find significant relief within the first few days of regular use.

What are the latest studies on levocetirizine for allergic rhinitis?

Clinical evidence consistently supports levocetirizine as an effective and well-tolerated antihistamine for allergic rhinitis and chronic urticaria, with studies showing it has a higher H1 receptor binding affinity than cetirizine at half the dose. Research published in peer-reviewed allergy journals has confirmed its rapid onset and 24-hour duration of action. The NHS and NICE both recognise second and third-generation antihistamines, including levocetirizine, as appropriate first-line treatments for allergic conditions.

How Should You Use Levocetirizine 5mg Tablets?

Levocetirizine 5mg tablets are taken orally, once a day. They are straightforward to use, but following the correct steps ensures you get the most from your treatment and minimise the risk of side effects.

What Is the Correct Dose of Levocetirizine 5mg?

The correct dose depends on your age and the condition being treated. Always follow the dosing instructions on the packaging or as directed by your pharmacist or GP. Do not adjust your dose without professional advice, particularly if you have kidney problems.

When Is the Best Time to Use Levocetirizine 5mg?

There is no strict requirement to take levocetirizine at a specific time of day, but consistency matters. Many people prefer taking it in the evening because any drowsiness it causes will coincide with sleep, leaving them feeling alert the following morning. If you are taking it for hay fever, starting treatment a few days before peak pollen season can help establish a baseline level of protection before symptoms peak.

How Long Can You Use Levocetirizine 5mg For?

For seasonal allergic rhinitis, levocetirizine is typically used throughout the relevant pollen season — often from late March through to September in the UK, depending on which pollens trigger your symptoms. For chronic idiopathic urticaria, longer-term use is sometimes appropriate under the supervision of a GP or dermatologist. If your symptoms persist beyond six weeks or worsen despite treatment, book an appointment with your GP to review your management plan.

Do not exceed the recommended dose. If in doubt, speak to your pharmacist.

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What Are the Most Common Side Effects of Levocetirizine 5mg?

Most people tolerate levocetirizine well, but like all medicines, it can cause side effects in some individuals. Common side effects affect up to 1 in 10 people and are generally mild.

  • Drowsiness or fatigue
  • Headache
  • Dry mouth
  • Nasopharyngitis (runny or irritated nose and throat)

What Are the Less Common Side Effects of Levocetirizine 5mg?

Less common side effects affect up to 1 in 100 people. If any of these bother you or do not resolve within a few days, speak to your pharmacist or GP.

  • Nausea or abdominal discomfort
  • Dizziness
  • Skin rash or itching
  • Palpitations (awareness of your heartbeat)
  • Difficulty passing urine (urinary retention)
  • Weight gain with prolonged use
  • Aggression or agitation (particularly in children)

What Are the Serious Side Effects of Levocetirizine 5mg?

Serious side effects are rare but require immediate medical attention. Stop taking levocetirizine and call 999 or go to your nearest A&E if you experience any signs of a severe allergic reaction (anaphylaxis), including sudden swelling of the face, lips, tongue, or throat, difficulty breathing, a rapid drop in blood pressure, or loss of consciousness. Seizures have been reported very rarely — if you experience a convulsion, seek emergency help immediately.

What Should You Do If You Experience Side Effects of Levocetirizine?

For mild side effects such as drowsiness or a dry mouth, try switching to an evening dose and staying well hydrated throughout the day. If side effects are persistent, troublesome, or unexpected, stop taking the tablet and contact your pharmacist or GP for advice. You can also report suspected side effects directly to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk — your report helps improve medicine safety for everyone.

Can Levocetirizine Interact With Other Medicines?

Yes. Levocetirizine can interact with several medicines and substances, potentially increasing side effects or altering how the drug works in your body. The most clinically significant interactions include alcohol and other CNS depressants (which increase sedation), ritonavir (which raises levocetirizine blood levels), and theophylline (which may slightly reduce levocetirizine clearance). Always inform your pharmacist of every medicine, supplement, or herbal remedy you are taking before starting levocetirizine.

If you are concerned about any side effects, contact your pharmacist or GP immediately.

Patient Information Leaflet

Important - Before taking any medication, it is always important to read the Patient Information Leaflet (PIL)

Written and reviewed by our qualified team

GPhC Number: 2233073
Tarun Kumar

Reviewed by:

Tarun Kumar

Superintendent/ Clinical Lead

📖 Find out more about our team of medical content authors and how we ensure the accuracy of our content with our content guidelines.

Content last updated: 31 Mar 2025

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